#include <gtk/gtk.h>
#include <clutter/clutter.h>
#include <clutter-gtk/clutter-gtk.h>
#include <stdlib.h>

ClutterActor *stage = NULL;

static gboolean
on_button_clicked (GtkButton *button, gpointer user_data)
{
	static gboolean already_changed = FALSE;
	if (already_changed) {
		ClutterColor stage_color = {0x00, 0x00, 0x00, 0xff };
		clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
	} else {
		ClutterColor stage_color = {0x20, 0x20, 0xA0, 0xff };
		clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);
	}

	already_changed = !already_changed;

	return TRUE;
}

static gboolean
on_stage_button_press (ClutterStage *stage, ClutterEvent *event, gpointer user_data)
{
	gint x = 0;
	gint y = 0;
	clutter_event_get_coords (event, &x, &y);

	g_print ("Stage clicked at (%d, %d)\n", x, y);

	return TRUE;
}

int main (int argc, char *argv[])
{
	ClutterColor stage_color = {0x00, 0x00, 0x00, 0xff};

	gtk_clutter_init (&argc, &argv);

	GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
	GtkWidget *vbox = gtk_vbox_new (FALSE, 6);
	gtk_container_add (GTK_CONTAINER (window), vbox);
	gtk_widget_show (vbox);
	GtkWidget *button = gtk_button_new_with_label ("Change Color");
	gtk_box_pack_end (GTK_BOX (vbox), button, FALSE, FALSE, 0);
	gtk_widget_show (button);
	g_signal_connect (button, "clicked", G_CALLBACK (on_button_clicked), NULL);

	g_signal_connect (window, "hide", G_CALLBACK (gtk_main_quit), NULL);

	GtkWidget *clutter_widget = gtk_clutter_embed_new ();
	gtk_box_pack_start (GTK_BOX (vbox), clutter_widget, TRUE, TRUE, 0);
	gtk_widget_show (clutter_widget);

	gtk_widget_set_size_request (clutter_widget, 200, 200);

	stage = gtk_clutter_embed_get_stage (GTK_CLUTTER_EMBED (clutter_widget));
	clutter_stage_set_color (CLUTTER_STAGE (stage), &stage_color);

	clutter_actor_show (stage);

	g_signal_connect (stage, "button-press-event", G_CALLBACK (on_stage_button_press), NULL);

	gtk_widget_show (GTK_WIDGET (window));

	gtk_main ();

	return EXIT_SUCCESS;
}
